percent composition aka “mass percent” aka “mass percent” aka “percent by mass” aka...

Download Percent Composition AKA “Mass Percent” AKA “Mass Percent” AKA “Percent by Mass” AKA “Percent by Mass” Component Mass Component Mass Total Mass Example:

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Practice: What is the percent composition for each component in sodium carbonate, Na2CO3? 2(22.99 g/mol) = g/molNa g/mol = g/molC + 3(16.00 g/mol) = g/molO g/mol Na2CO3

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Percent Composition AKA Mass Percent AKA Mass Percent AKA Percent by Mass AKA Percent by Mass Component Mass Component Mass Total Mass Example: C2H4O2C2H4O2C2H4O2C2H4O2 2(12.01 g/mol) = g/molMass C 4( 1.01 g/mol) = 4.04 g/mol Mass H +2(16.00 g/mol) = g/molMass O g/molMass C 2 H 4 O g/molMass C 2 H 4 O 2 X 100% % Composition % C % C % H % H % O % O Total = % 39.99% C 53.28% O 6.73% H Practice: What is the percent composition for each component in sodium carbonate, Na2CO3? 2(22.99 g/mol) = g/molNa g/mol = g/molC + 3(16.00 g/mol) = g/molO g/mol Na2CO3 Na: Na: C: C: O: O: Total = % 43.38% Na 45.29% O 11.33% C Converting Mass Percent to an Empirical Formula (Mole Ratio) Determine Determine the empirical formula of a compound that contains 58.84% Barium, 13.74% Sulfur and 27.43% Oxygen. Assume 100 g 58.84% Ba58.84 g Ba 13.74% S13.74 g S 27.43% O27.43 g O Did somebody ask for a mole? Ba : S : O mol : mol : mol mol mol mol mol mol mol : : BaSO 4 Barium Sulfate

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